書誌事項
- 公開日
- 1978-02-27
- 権利情報
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- https://www.cambridge.org/core/terms
- DOI
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- 10.1017/s0022112078000415
- 公開者
- Cambridge University Press (CUP)
この論文をさがす
説明
<jats:p>In this paper we assess the importance as a noise source of the well-ordered large-scale structure of a jet. We propose two simple models of the structure: the first emphasizes those features in common with waves that initially grow on an unstable shear layer but eventually saturate and decay, while the second regards the abrupt pairing of eddies as the most significant event in the jet's development. Our models demonstrate the possibility that forcing at one frequency could increase the <jats:italic>broad-band</jats:italic> noise of a jet, though, for jets with supersonic eddy convection velocities, the sound propagating in the direction of the Mach angle retains the spectrum of the excitation field. These features are consistent with the available experimental data, and strongly support the view that the large-scale structure of jet turbulence provides the dominant contribution to jet noise.</jats:p>
収録刊行物
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- Journal of Fluid Mechanics
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Journal of Fluid Mechanics 84 (4), 673-694, 1978-02-27
Cambridge University Press (CUP)